2 Answers

There is a switch located behind the lamp vent panel on the back of the set. Remove the vent panel and hold this switch in the down position while you turn the set on. The set should stay on as long as this switch is in the down position. If the set stays on, check the inside of the cover you just removed from the set. Locate where the switch rests against it and make sure that it is not broken. When you reinstall the vent cover, lay it flat against the back of the set and slide it down so it can catch the switch on the way down. Most times this switch will come loose and flip up while moving the set. Or if you just replaced a lamp and didn't get the switch back in the right position.

Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.

Related Questions:

Listen closely at the rear of the set for any noise from a fan. Most projection sets have them to cool high temperature areas common in these and if the fan fails, the set will shut itself off before any heat damage results.
If you hear nothing, use a portable fan directed at visible openings in the lower cabinet and see if this delays the shut-off of the set.
If so, the fan is likely dead.

HI, this may be a simple cooling issue. try inspecting the cooling fans that are located near the power sector. if these cooling devices are not operational, they will cause the power board to shut down periodically, due to heat build up.

If the fans are operational, this will confirm a weak and defective power power board.